| Name | Meaning | Gender | Origin |
|---|
| Hercules | glory of Hera | Male | Greek |
| Holly | Holy
| Female | English |
| Howie | Brave Heart, Mind | Unisex | English |
| Hudson | Hugh's son | Male | English |
| Igor | Scottish variation of Welsh Ifor, lord or English form of Scandinavian Ifar, yew | Male | Russian |
| Isaac | laughing one | Male | Hebrew |
| Isaiah | salvation of the Lord | Male | Hebrew |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jacob | The supplanter, held by the heel | Male | Hebrew |
| Jagger | a teamster | Male | English |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| Jamaica | Isle with many springs | Female | Place-name |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jamie | Feminine of James | Female | Scottish |
| Jarvis | driver, a conqueror | Male | English |
| Jason | the Lord is salvation | Male | Hebrew |
| Jay | jaybird | Male | Latin |
| Jennifer | white shadow, white wave | Female | Cornish |
| Jerry | after Jerry Garcia, The Grateful Dead | Male | English |
| Jessica | God's grace | Female | Hebrew |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Jim | supplanter | Male | English |
| Jimmy | supplanter | Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |